Karyotype studies in Mimosa (Mimosoideae, Leguminosae) from southern South America and ecological and taxonomic relationships

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In this work we studied the chromosome number and karyotype formula of seven species of Mimosa L. (Mimosoideae, Leguminosae). The chromosome number 2n = 2x = 26 for M. detinens Benth., M. hexandra M. Micheli, M. ostenii Speg. ex Burkart and M. xanthocentra Mart. var. mansii (Benth.) Barneby are new...

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Autores principales: Matías, M., Wulff, A.F., Fortunato, R.H., Poggio, L.
Formato: JOUR
Materias:
Chromosome
Cytogenetics
Karyotype
Leguminosae
Mimosa
Mimosoideae
Fabaceae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00087114_v64_n2_p201_Matias
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00087114_v64_n2_p201_Matias2023-10-03T14:07:54Z Karyotype studies in Mimosa (Mimosoideae, Leguminosae) from southern South America and ecological and taxonomic relationships Matías, M. Wulff, A.F. Fortunato, R.H. Poggio, L. Chromosome Cytogenetics Karyotype Leguminosae Mimosa Mimosoideae Fabaceae Mimosa Mimosoideae In this work we studied the chromosome number and karyotype formula of seven species of Mimosa L. (Mimosoideae, Leguminosae). The chromosome number 2n = 2x = 26 for M. detinens Benth., M. hexandra M. Micheli, M. ostenii Speg. ex Burkart and M. xanthocentra Mart. var. mansii (Benth.) Barneby are new records, while the chromosome number 2n = 2x = 26 for M. debilis var. debilis, M. urugüensis Hook. and Arn. and M. uliginosa Chodat and Hassl. confi rm previous records. Karyotype formulae revealed the existence of metacentric and submetacentric chromosomes, and the chromosomal asymmetry indexes did not show signifi - cant differences between taxa. The chromosome length of xerophilous and endemic M. detinens and M. ostenii differed from the rest of species, indicating that this parameter could have taxonomic value. In addition, the relationship between total chromosome length and climatic parameters showed that diploid species of marginal areas of distribution have a larger chromosome size, and that this could be related with mechanisms of ecological adaptation. Fil:Wulff, A.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Poggio, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00087114_v64_n2_p201_Matias
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Chromosome
Cytogenetics
Karyotype
Leguminosae
Mimosa
Mimosoideae
Fabaceae
Mimosa
Mimosoideae
spellingShingle Chromosome
Cytogenetics
Karyotype
Leguminosae
Mimosa
Mimosoideae
Fabaceae
Mimosa
Mimosoideae
Matías, M.
Wulff, A.F.
Fortunato, R.H.
Poggio, L.
Karyotype studies in Mimosa (Mimosoideae, Leguminosae) from southern South America and ecological and taxonomic relationships
topic_facet Chromosome
Cytogenetics
Karyotype
Leguminosae
Mimosa
Mimosoideae
Fabaceae
Mimosa
Mimosoideae
description In this work we studied the chromosome number and karyotype formula of seven species of Mimosa L. (Mimosoideae, Leguminosae). The chromosome number 2n = 2x = 26 for M. detinens Benth., M. hexandra M. Micheli, M. ostenii Speg. ex Burkart and M. xanthocentra Mart. var. mansii (Benth.) Barneby are new records, while the chromosome number 2n = 2x = 26 for M. debilis var. debilis, M. urugüensis Hook. and Arn. and M. uliginosa Chodat and Hassl. confi rm previous records. Karyotype formulae revealed the existence of metacentric and submetacentric chromosomes, and the chromosomal asymmetry indexes did not show signifi - cant differences between taxa. The chromosome length of xerophilous and endemic M. detinens and M. ostenii differed from the rest of species, indicating that this parameter could have taxonomic value. In addition, the relationship between total chromosome length and climatic parameters showed that diploid species of marginal areas of distribution have a larger chromosome size, and that this could be related with mechanisms of ecological adaptation.
format JOUR
author Matías, M.
Wulff, A.F.
Fortunato, R.H.
Poggio, L.
author_facet Matías, M.
Wulff, A.F.
Fortunato, R.H.
Poggio, L.
author_sort Matías, M.
title Karyotype studies in Mimosa (Mimosoideae, Leguminosae) from southern South America and ecological and taxonomic relationships
title_short Karyotype studies in Mimosa (Mimosoideae, Leguminosae) from southern South America and ecological and taxonomic relationships
title_full Karyotype studies in Mimosa (Mimosoideae, Leguminosae) from southern South America and ecological and taxonomic relationships
title_fullStr Karyotype studies in Mimosa (Mimosoideae, Leguminosae) from southern South America and ecological and taxonomic relationships
title_full_unstemmed Karyotype studies in Mimosa (Mimosoideae, Leguminosae) from southern South America and ecological and taxonomic relationships
title_sort karyotype studies in mimosa (mimosoideae, leguminosae) from southern south america and ecological and taxonomic relationships
url http://hdl.handle.net/20.500.12110/paper_00087114_v64_n2_p201_Matias
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